This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 4 |
| 11 | 44 |
| 12 | 6 |
| 13 | 78 |
| 14 | 8 |
| 15 | 16 |
| 16 | 18 |
| 17 | 234 |
| 18 | 124 |
| 19 | 468 |
| 20 | 516 |
| 21 | 882 |
| 22 | 2092 |
| 23 | 7068 |
| 24 | 22794 |
| 25 | 85456 |
| 26 | 275732 |
| 27 | 974048 |
| 28 | 3698242 |
| 29 | 14120996 |
| 30 | 59531852 |
| 31 | 252272512 |
| 32 | 1163430462 |
| 33 | 5229335374 |